Arc lamp



y 2, 1933. w. c. SFIETH 15,906,481

ARC LAMP Filed June 10, 1929 2 Sheets-Sheet i Izguengtoa:

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WMZ M Patented May 2, 1933 nlAIr PATENT OFFICE WILLIAM C. SPIETI-I, OF GENEVA, OHIO ARC LAMP Application filed June 10,

My invention relates to arc lamps of the type particularly adapted for giving heliotherapy treatments, and the principal object of my invention is to provide a new and improved arc lamp of this type. In the drawings accompanying this SPGClfiCEL tion and forming a part of this application I have shown, for purposes of illustration, one form which my invention may assume and in these drawings:

Figure 1 is a side elevation of this illustrative embodiment of my invention,

Figure 2 is a front elevation with part of the base shown in section,

' Figure 3 is a section taken on the line 23 of Figure 2,

Figure 4 is a section taken on the line 4-4 of Figure 3,

Figure 5 is a section taken on the hue 5-5 of Figure 4:,

Figure 6 is a bottom plan view with the closure plate removed, 7

Figure 7 is an enlarged fragmentary vertical sectional view showing the base.

The use of arc lamps for administering helio-therapy treatments or so-called sun ray treatments is quite common and frequently such lamps are used in the home by people who do not posses technical knowledge concerning the using of such lamps, accordingly arc lamps adapted to be used for such purposes should be light and compact so that they may be readily moved from place to place and should be of such a simple construction that they may easily and handily operated and repaired by people not possessing technical knowledge relating to such lamps. I have discovered that a light weight, small, compact, and attractive lamp possessing the inherent qualities of durability and simplicity may be cheaply and easily constructed by mounting an arc lamp on a relatively small standard supported on a base consisting of two cooperating rim sections screwthreadedly assembled so that the separate units of the base may be distinctively colored to produce an attractive lamp. I have also discovered that the current may be supplied to the electrodes through ears supporting the electrodes which may be suit- 1929. Serial No. 389,856.

ably encased in sleeves and provided with convenient handles for easily regulating them, and also that by mounting the electrodes at a considerable distance away from the open end of a reflector that such reflector will serve to limit spreading of the rays produced by said electrodes. I have also discovered that a quickly attachable and detachable ray filter may be provided, and that such ray filter may be easily constructed so so that different filter elements may be quickly and easily inserted therein for screening out any undesirable rays.

I show the embodiment of my invention as applied to an electric arc lamp 11 having a reflector 12 supported on a standard 13 which in turn is mounted on a base section 14 consisting of an annular supporting rim 15 sloping inwardly along its top and provided along its top edge with an inwardly extending flange 16, and a disc 17 provided centrally with an annular aperture and positioned with its outer periphery fitting into the flange 16 on the supporting rim 15 and provided along its inner periphery with a similar inwardly extending flange 18 receiving the outer periphery of the lower end of the standard 13, the disc 17 being secured to the supporting rim 15 by machine screws 19 while the standard 13 likewise is secured so to the disc 17 by machine screws 20. A closure plate 21 is secured in the bottom of the supporting rim 15 in any suitable manner, as by machine screws 70 passing through apertures 71 in the plate 21 and re- Ceived in screw threaded apertures 72 in lugs 73 on the rim 15.

A switch means 22 for controlling the supply of current to the lamp 11 is supplied with current by means of conductors 23 leading from a source of current.

The top of the standard 13 terminates in an integrally formed apertured boss 24 receiving within the aperture therein a set screw 25 while an apertured lug 26 screw threadedly mounted on the lower side of the reflector 12 is mounted on the set screw 25, and a wing nut provided with a convenient handle 28 provides a means for releasably locking the lug 26 between the boss 24 of the standard 13 and the wing nut 27, thereby permitting the reflector 12 to be readily swung on the set screw 25.

The reflector 12 preferably is made of aluminum and may be spun into any desirable shape, preferably cylindrical, and the front edge of the reflector 12 providedwith a bead 29 formed by rolling back the front edge, while the rear section 80 of the reflector is bowl shaped and provided with a multiplicity of small apertures 31 for afl'ording ventilating facilities. A mounting plate 32 secured to the inside of the reflector 12 by machine screws 33 is providedwith two parallel forwardly extending vertically disposed lugs 34 while machine screws 39 mounted on the back of the mountin plate 32 carry insulator spools 35 around 'wfig'ch are mounted resistance elements 36, an a handle 37 bolted to the center of the rear end 30 of the reflector 13 provides a cohvenient means for grasping the reflector 12 for altering its position.

Two ears '38 mounted on the front of the lugs 34 by machine screws 40 are separated from the lugs 34 by strips of insulating material 41 and are provided with threaded horizontal apertures 42 receiving two cooperatingly threaded ends of two supporting Sleeves 43 extending through apertures 44 in the sides of the reflector and projecting somewhat therebeyond. These supporting sleeves 43 are provided with longitudinal slots 45 extending from the outside ends .of the supporting sleeves 43 to the side of the reflector 12, and two carbon sleeves 46 adapted to readily slide in the supportin sleeves 43 are provided with tapering ends 4 adapted to firmly grip the carbons 48. Small coil springs'49 mounted in small tubes 50 "screw threadedly positioned in small apertures in the carbon sleeves 46 are adapted to dutwardly press against small detents 51 extending through the apertures in the carbon sleeves 46 for frictionally engaging the inner "surfaces of the supporting sleeves 43 for resiliently holding the carbon sleeves 46 in the 'su porting sleeves 43, while handles '52 suita y secured to the carbon sleeves 46 near the outer ends thereof are properly insulated therefrom and provide a convenient means for reciprocating the carbon sleeves 46 in the supporting sleeves 43 by reeiprocating the handles along in the slots 45 in the supporting sleeves 43.

Insulating sleeves 53 are loosely mounted around the su porting sleeves 43 and are provided exteriorl of the reflector 12 with longitudinal slots 5 corresponding with the slots 45 in the supporting sleeves '43, -inter- "mediately with discs 56 integral" formed with the insulating sleeves 53 an elfect'ive to'limit the extent to which the insulating sleeves 53 may be inserted in the apertures 44 in the sides of the reflector 12, and at their inner ends with threaded sections 54 on which are mounted insulation nuts 57 holding the insulatin sleeves 53 securely mounted against the inside of the reflector 12. Insulation washers 58 mounted on the insulating sleeves 53 on both sides of the reflector 12 provide suitable insulation.

Conductors 59 connect the switch means 22 to terminals 60 and 61 positioned within the rear section 30 of the reflector 12, the terminal 60 being connected to one of the machine screws 40 screw threadedly mounted on one of the cars 38 supporting one of the carbons 48, whereas the terminal 61 is connected to the two resistance elements 36 in parallel, and the two resistance elements 36 are connected by a further conductor 74 to the other machine screw 40 and thus to the other carbon 48.

Under certain circumstances it may be desirable to screen out certain rays produped b. the lamp 11, accordingly I provide a lter screen 62 comprising an annular frame 63 taperin slightly near the front thereof and provi ed at the front ed with an inwardly extending flange 64 whl e a ray filtering material, herein shown as a sheet of quartzite 65, is placed on the inside of the flange 64 and held against the flange 64 by small machine screws 66 provided with locking nuts 67, and outwardly flaring beaded section 68 of the frame 63 substantially near the back edge thereof serves to limit the distance that the frame 63 may be inserted into the front of the reflector 12. Two handles 69 facilitate the handling of the frame 63.

It will be apparent to those skilled in the art that I have provided a small, compact, and readily portable lamp which on account of these features and its simple construction and attractive design is particularly adapted for giving heliotherapy treatments in the home. It further will be apparent to those skilled in the art that I have provided a simple and economical means for preparing and assembling the separate base sections and that I have provided a switch means in a readily accessible position on the standard.

v It further will be a parent to those skilled in the art that I have provided a new and novel means of suppl ing the current to the electrodes through t e electrode suports and the sleeves surrounding the caron, and that I have provided convenient handles for reciprocating the electrode carrying sleeves in the support sleeves, and that proper safeguards for insulation have been rovidcd.

It urther will be apparent to those skilled in the artthat on account of the sha and construction of the reflector and t e placing of the electrodes within said re, flector a predetermined distance from the carrying sleeves adapted to firmly grasp said front thereof, said reflector will serve as a concentrator to limit and concentrate the rays produced by said lamp, also that I have provided a quickly attachable and detachable filter screen, and that various ray filter elements may be easily inserted in said filter screen to screen out any undesirable rays produced by said lamp.

Therefore it will be understood that the embodiment of my invention herein shown and described accomplishes at least the principal object of my invention.

At the same time it also will be obvious to those skilled in the art that the embodiment of my invention herein disclosed may be variously changed, modified, and used, all without departing from the spirit of my invention or sacrificing the advantages thereof, and it therefore will be understood that the disclosure herein is illustrative only, and that my invention is not limited thereto.

I claim:

1. An arc lamp comprising: cooperating electrodes; supporting means substantially near the gap thereof for supporting said electrodes; supporting sleeves fixedly mounted in said supporting means and provided with longitudinal slots, spring pressed friction devices carried by said electrode sleeves and bearing against the inside of the supporting sleeves to hold the electrode sleeves as set; electrode carrying sleeves adapted to firmly grasp said electrodes; and insulated handles extending laterally from said electrode carrying sleeves through said slots and adapted to be reciprocated in said slots for reciprocating said electrode sleeves and said electrodes in said supporting sleeves.

2. An arc lamp comprising: a reflector; cooperating electrodes mounted in said reflector; a supporting means substantially near the gap thereof for supporting said electrodes, said means being spaced inwardly from the Wall of the reflector; supporting sleeves fixedly mounted in said supporting means projecting through said reflector and provided with longitudinal slots; electrode electrodes; insulating sleeves mounted around said supporting sleeves on the parts extending outside said reflector and provided with corresponding slots; and insulated handles extending laterally from said electrode carrying sleeves through said slots and adapted to be reciprocated in said slots for reciprocating said electrode sleeves and said electrodes in said supporting sleeves.

3. An arc lamp comprising: cooperating electrodes; supporting means substantially near the gap thereof for supporting said electrodes; supporting sleeve fixedly mounted in said supporting means and provided with longitudinal slots; electrode carrying sleeves adapted to firmly grasp said electrodes; detents projecting through apertures in said electrode sleeves, and springs mounted in said electrode sleeves and adapted to exert tension against said detents for causing said detents to resiliently engage the inner surfaces of said supporting sleeves for firmly holding said electrode sleeves in said supporting sleeve; and insulated handles extending laterally from said electrode carrying sleeves through said slots and adapted to be reciprocated in said slots for reciprocating said electrode sleeves and said electrodes in said supporting sleeves.

4. An arc lamp comprising: cooperating electrodes; electrode sleeves adapted to firmly clasp said electrodes; supporting sleeves for supporting said electrode sleeves provided with longitudinal slots; supporting means substantially near the gap formed by said electrodes for fixedly supporting said supporting sleeves and adapted to conduct current to said electrodes through said sup porting sleeves and said electrode sleeves; detents projecting through apertures in said electrode sleeves, and springs mounted in said electrode sleeves and adapted to exert tension against said detents for causing said detents to resiliently engage the inner surfaces of said supporting sleeves for firmly holding said electrode sleeves in said supporting sleeves; and insulated handles extending laterally from said electrode sleeves through said slots and adapted to be reciprocated in said slots for reciprocating said electrode sleeves and said electrodes in said supporting sleeves.

In testimony whereof I hereunto afiix my signature.

WM. C. SPIETH. 

